Thomas f



(No Model.) 2 Sheets-f-Sheet 1.

T. F. GILROY.

GLASS BBVBLING MAGHINB.

No. 271,888. Patented Feb. 1888.

ATTORNEYS.

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(No' Model.) 2 Sheets-Sheet 2.

T. I'. GILROY. GLASS BEVELING MACHINE. No. 271,836. Patented'leb. 6, M383.

WITNESSBS INV'BNTOR MZ@ v JHM-. wwr/ BYU i ATTORNEYS.

THOMAS F. GILROY, oF NEW voelt, N. Y.

PATENT OFFICE.

GLASS-BEVELAING MACHINE.

SPECIFICATION forming part of Letters Iatent No. 271,836, Vdated. February 6, 1883.

Application iiled June 12, 1882. (No model.)

l To all whom it may concern V Be it known that I, THOMAS F. GILRoY, of the city, county, and State of New York, have invented a new and Improved' Machine for Beveling Glass, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved machine for beveling the edges of circular and oval or similar mirrors with curved or partly-curved edges.

' My invention relates to improvements in glass-beve1ing machines; and uit consists in the peculiariconstruction and arrangement ot'A parts, as hereinafter more fully set forth.

Reference is to be had to the accompanying drawings,torrning part of this specification, in which similar letters of reference indicate correspondingparts in all the tigures.

Figure lis a longitudinal sectional elevation of my improved glass-beveling machine on the line m Fig. 2, the grinder being left in ele-` vation. Fig. 2 is a plan view of the same, parts being broken out and shown in section. Fig. 3 is a longitudinal elevation of the same, parts being shown in section.

. The ahrading-wheel A is mounted rigidly on the upper end of a vertical shalt, A', so as to rotate in the horizontal plane, which shaft A' is journaled in a frame, C, and has its lower' end resting on a step, a, at the inner end of a pivoted lever, B, provided at its outer end with an adjustable balancing-weight, B'. A cord, b, is attached to the outer end of the lever B, and passes over suitable pulleys and over the top of the frame or table G. The shaft A' is provided with a series of helt-pulleys, c, around which a belt or cord, c', can be passed. A sponge, d, is held in a sponge-cup, D, attached `to an arm, D', held adjustably on a standard,

E, on the frame @,which spongeis pressed against the periphery of the abradingwheel A to absorb the water that drops upon the wheel, and thus prevents the water from be ing'thrown from the Wheel A by the centrif ugal force. A standard, F, rests on tracks F' on the `frame G, and from the'bottom of this standard F a lug,f, projects, which is provided with a longitudinal threaded aperture, through which a screw-spindle, G, passes, which is provided at its outer end with a handwheel, G', and at its inner end with a head, g, held to turn in a block, g', on the frame C, so

i that the standard F can be moved to or from.

the shaft A' by turning the hand-wheel G'. A- curved or angular arm, H, is pivoted at its, lower end in a recess, h, in the standard F, and thiscurved arm H has a recess, H', formed in `its outer edge, in'which the block I is piv-' oted transversely. vA screw-spindle, lll, passes through a nut, J', pivoted in the standard F above thejoint ofthe arm H,which spindle J is provided at its outer end with a hand-wheel, J2, and at its inner end witlra head held to turn in the pivoted block I. An arm,j, projects V'from the inneredge ofthe curved arm H, near the pivot of the same, and on the outer end ot' this armj a glass-holding plate, ic, is `pivoted in such a manner that this -plate rests iat on Y the arm j. A glassholding plate, l, is attached to thelower end ota spindle, K, passing loosely `through the outer end of an arm, K', ot' the curved arm H, the upper end of which spindle K passes into a screw-socket, m, at the lower i end of a screw-spindle, m', passing through the Lipper outer end ot' the curved arm H, and provided at its outer or upper end with a. handle, fm2.

Akbeveled cog-wheel, n, is mounted on the spindle K, above the arm K', in such a manner that it will rotate withA this spindle K, but can slide longitudinally on the same. A spiral spring, n', surrounding the spindle K, presses this beveled cog-wheel n on the upper surface of the arm K'. A beveled cogwl1,eel,o, engages with the beveled cog-Wheel n, and is mounted on one end ot` a shaft, L, on the opposite erifd of which is mounted a beveled cogwheel, j), engaging with a beveled cog-wheel, q, mounted on the upper end of a shaft, M, journaled on the side ofthe curved arm H,'on the opposite end of which shalt M a beveled cog-wheel, r, is mounted, which engages with a beveled cog-wheel, s, loosely mounted on the pivot s' ofthe arm H on the standard F,with which cog-wheel s a cog-wheel, t, engages,

which is mounted on a shaft, N, on the lower end ofwhich a beveled cog-wheel, u, is mounted,

which engages with a beveled cog-wheel, c,`

ICO g it will turn with the shaft, but can be adjusted longitudinally on thesame, so that when the standard F is moved to or from thesh'aft A' the wheel O' will slide on this shaft O.

The operation is as follows: The glass plate R, which is to have its edges beveled,is placed between the glass-holding plates kand'l, and is held firmly by pressing the spindle K upon the glass plate It by turning down the screwspindle m'. If power is applied, the abradingwheel A will be rotated, and the spindle Kwill be rotated by means of the beveled cog-wheels a o and the above-described shafts and bevelcd cog-wheels for transmitting power, and thus the glass plate R will be revolved with the spindle K. By turningthe hand-wheel J2 the inclination of the vertical part of thearm H toward the standard can be varied more or less, and consequently the inclination of the shaft A', so that the differentparts of the upper surface of the abrading-wheel can be used to act on the edge of the glass plate, thereby1 avoiding making a hollow or groove in the abradingsurface of the wheel A. If the plate It, which is to be provided with beveled edges, is oval or any similar curved shape, the distance from the center of the plate to the surface of the wheel A will vary, and the wheel A must rise and fall automatically, according to the variations of this distance. For instance, if the longitudinal axis of the plate R is parallel with the radius of the wheel A, as shown in Fig. 2, the wheel A must be lowered. The glass plate It is rotated continually,and after a short time the transverse axis of the plate It will be parallel With the radius of the wheel A, and as this transverse axis is shorter than the longitudinal axis of the plate It, it is evident that the wheel A must rise so as to be able to act on the plate R when its short axis is presented tothe abrading-.wheeL These movements -up and down ofthe abrading-wheelare governed lby the shape of the glass plate R, for as the same turns it pushes the wheel A downward, and the weight B' forces 'the wheel A upward again as soon as the long axis of the plate R leaves the wheel A. So that the glass plate will notv break by acting on the wheel A in the manner described, this Wheel must be verycarefully balanced, or otherwise it would chip oi the edges of the plate R. rllhe cord b is used to raise Ithe weight B' and lower the shaft A' of the wheel A when a fres'n glass plate R is to be placed between the glass-holding plates 7c l. The abrading-Wheel A rotates very rapidly, and the glass-holdin g plates 7c l rotate very slowly in comparison to the speed of the Wheel A .Having thus fully described my invention, I claim as .new and desire to secure by Letters l. In a glass-beveling machine, the combination, with the pivoted arm H, carrying the glass-clamping plates 7c l, of the abrading- Wheel A, mounted on 'the upper end of the shaft A', and the lever B, having step a and counterbalance-Weight B', whereby the abrading-wheel is adapted to rise and fall automatically toconform to the curve of the edge of the plate being ground, substantially as shown and described.

2. In a glass-beveling machine, the combination, with the abrading-wheel A, of the pivoted arm H, clamping-plates lc l, spindle K, screw m', pivoted block I, screw-spindle J, and pivoted nut J', substantially7 as and for the purpose set forth.

3. In a glass-beveling machine, the.combi nation, with the abrading-wheelA. ofthe arm H, the plates le and Z, the spindle K, attached to the plate l, the springe', surroundingthe spindle K, the beveled cog-wheel a, splined to the spindle K, the screw m', and the devices for rotating the beveled cog-wheel n, substantially as herein shown and described, and for the purpose set forth.

4. In a glass-beveling machine, the combination,with the abrading-wheel A, of the glass` plate-holding device, held in the arm H,of cogwheels and shafts held on the arm H, beveled oog-wheels and shafts on the standard F, the cog-Wheel s on the pivot ot' the arm H, devices for rotating the beveled cog-wheels and shafts on the standard F from the shaft ot the abrad- .ing-wheel A,substantially.as herein shown and described, and for the purpose set forth.

THOS. F. GILROY.

Witnesses:

i J. H. SiMoNs.

MARTIN J. GILRoY.

IOO 

